Department of Environmental Science and Engineering, POPs Research Center, Tsinghua University, Beijing, PR China.
Chemosphere. 2010 Sep;81(3):345-50. doi: 10.1016/j.chemosphere.2010.07.025. Epub 2010 Aug 21.
Dechlorane Plus (DP) was co-ground with calcium oxide (CaO) powder in a planetary ball mill at room temperature. A mechanochemical reaction was induced, resulting in the decomposition of DP through dechlorination. The influences of both the charge ratio and content of CaO were investigated. The co-ground samples were characterized and analyzed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, gas chromatography/mass spectrometry (GC/MS), and ion chromatography (IC). With the increase in grinding time, the remained DP decreased and finally was completely destroyed after 4h grinding time in the mixture with a CaO/DP ratio of 25:1 and a charge ratio of 36:1. At the same time, the water-soluble amount of chlorine increased correspondingly and reached 88.6%, demonstrating that dechlorination is the major degradation mechanism. The main degradation products in the final reaction were carbon and CaCl(2), beside the excess CaO. The first carbon structure appeared after grinding treatment was graphite, while the second was amorphous carbon.
脱氯甲桥萘（DP）与氧化钙（CaO）粉末在行星球磨机中于室温下进行共研磨。研磨过程中引发了机械化学反应，导致 DP 通过脱氯作用发生分解。考察了不同的装料比和 CaO 含量对反应的影响。采用 X 射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、拉曼光谱、气相色谱/质谱（GC/MS）和离子色谱（IC）对共研磨样品进行了分析和表征。随着研磨时间的延长，在 CaO/DP 为 25:1、装料比为 36:1 的混合物中研磨 4h 后，剩余 DP 的含量逐渐降低，最终完全被破坏。与此同时，氯的水溶量相应增加，达到 88.6%，表明脱氯是主要的降解机制。最终反应的主要降解产物除了过量的 CaO 以外，还有碳和 CaCl2。研磨处理后首次出现的碳结构为石墨，第二次则为无定形碳。
